Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee88fac35eb5d24c…

MALICIOUS

PDF

74.0 KB Created: 2021-09-13 20:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f4ba33b2e56566c388da5ce4a10528e0 SHA-1: 3e75f50939e96c37b88c7611cf92f19f2d12c864 SHA-256: ee88fac35eb5d24cbdf411964ad5ea33cf68a31f00e65f9a56bf1c84bac76b43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://modernplating.com/userfiles/file/76808915038.pdf In PDF document text
    • http://www.radio-kum.si/data/files/43934456455.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/72372023609.pdfIn PDF document text
    • https://pecintajp.com/contents/files/jowugazirigodo.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/kpa9tgahl0chmpb5a33uv9ocv2/rokobim.pdfIn PDF document text
    • https://norservis.info/files/files/92213533565.pdfIn PDF document text
    • https://vocembalo.ch/userfiles/file/lotazabuxawe.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/sqldfnv1ja9e10rmmj4vsdrtl0/46857544590.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/4935934875.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/80697782995.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/43463298723.pdfIn PDF document text
    • https://8cj2aja7-8mxb.com/contents/files/92574887939.pdfIn PDF document text
    • http://iberia-ex.com/images/blog/file/gerobomabo.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/zafevagenazuzuze.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/9cb5056fdf2481b14612a8547465b1dc/vifaxelupotaxigolusi.pdfIn PDF document text
    • http://quatanggiabao.com/images/uploads/files/96389356119.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/fadifak.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/kotozulolazutej.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/kasawunofoxorajabiver.pdfIn PDF document text
    • http://355353.ru/userfiles/file/61054882641.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/zuzalezuju.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/22220532633.pdfIn PDF document text
    • https://wroclawmodelshow.pl/ckfinder/userfiles/files/97004533101.pdfIn PDF document text
    • http://dlzhrjd.com/images/uploadfile/files/vinapek.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/merakaxuwuwa.pdfIn PDF document text
    • http://naturabliskociebie.pl/userfiles/file/xejoxabugabufitikubobineb.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=the+sage+encyclopedia+of+qualitative+research+methods+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5D4 16108 bytes
SHA-256: 6a70ac8d985ff80b34e7dfd6b7e8df6c677fdc15586d24e2183a5829f8c0ce4e
font_02_sfnt_off0000ff03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF03 11456 bytes
SHA-256: b250cd238a39517463676404c0073e55b4ec8bbf8ae386d41d57ac024a8f1abe

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